Maryland Center for Fundamental Physics
University of Maryland
College Park, MD
March 30-April 2, 2014
You are invited to the MCFP mini-workshop on lattice parton physics project (LP3) in University of Maryland, College Park, MD, March 30-April 2, 2014. The workshop will consist of presentations and open discussions.
Understanding the QCD structure of the nucleon and nuclei is of fundamental importance in sub-atomic physics. A major focus of research on this topic is the partonic structure of the nucleon, including its spin structure.through the vast investigations in the last few decades. Great opportunities in the near future with continuing projects from RHIC at Brookhaven National Lab and CEBAF at Jefferson Lab, and the planed electron-ion collider (EIC) will undoubtly deepen our understanding of the fundamental questions associated with the nucleon structure. In particular, the EIC will provide unprecedented precision in exploring many of the outstanding questions.
In line with these experiment upgrades and future plans, we envision that the theory developments should be taken as well. Among them, the lattice QCD, the first principle QCD computation, becomes the most prominent tool. In particular, it has provided more and more important insights in our understanding of partonic structure of nucleon. This is not only because the computer power available for us became stronger, but also because the advanced computation techniques such as the most efficient algorithms has been applied for lattice QCD calculations. More importantly, new ideas have also emerged in recent years to undertake the difficult task to solve the non-perturbative problems associated with the parton distributions. Noticeable developments include the mixed action in lattice QCD simulation, chiral effective theory advance to perform extrapolation down to physical pion mass, and proposals to compute the parton distributions directly from lattice in Euclidean space, etc.
Of course, challenges are still ahead. In particular, although there have been strong efforts in lattice community to study the parton physics, we do not have a unified voice or a closed collaboration in doing the computations. We believe it is the right time to bring together the experts working in lattice QCD and the phenomenologists working in hadron structure to discuss the relevant open questions. Through the detailed discussions, we shall be able to identify the most important questions in parton physics which can be rigorously addressed by lattice QCD, and set a prioritized working list for the relevant physics topics. All these activities are in coordinating with the on-going efforts from the hadron physics community with the existing experiments upgrades and future plans.
Xiangdong Ji (Maryland/Shanghai Jiaotong),
Huey-Wen Lin (Seattle),
Kostas Orginos (William and Mary/JLab),
Jianwei Qiu (Brookhaven),
Christian Weiss (JLab),
Feng Yuan (LBNL)